1) Who first proposed that light has properties of both a wave and a particle? a) Albert Einstein b) Max Planck c) Louis de Broglie d) Neils Bohr 2) If the _____ of the incoming light is too small, no electrons will be ejected from the metal surface. a) wavelength b) frequency c) amplitude d) exposure time 3) What is the threshold frequency? a) the maximum frequency that would allow electrons to be ejected from the metal b) the minimum frequency that would allow electrons to be ejected from the metal c) the highest frequency of visible light d) the lowest frequency of visible light 4) If light behaved only as a wave, what would happen when light below the threshold frequency was shined onto the metal surface? a) No electrons would ever be ejected. b) Electrons would be ejected at a very slow speed. c) Electrons in the metal would be stabilized by the addition of energy. d) Electrons would eventually be ejected when the light was shined onto the surface for a long time. 5) Suppose that the threshold frequency in a photoelectric effect experiment corresponds to blue light. Would the following colors of light cause electrons to be ejected from the metal surface? a) yellow b) red c) green d) violet 6) Suppose that the threshold frequency in a photoelectric effect experiment corresponds to yellow light. Would the following colors of light cause electrons to be ejected from the metal surface? a) More electrons are ejected, but the electrons move at the same speed as before. b) The number of ejected electrons is the same, but the electrons move faster. c) More electrons are ejected and the electrons move faster. d) There is no effect on either the number of ejected electrons or their speed. 7) An increase in the _____ of the incoming light causes an increase in the number of ejected electrons. a) intensity b) frequency c) wavelength d) speed

Photoelectric effect Quiz

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